//! LumosAI 遥测和监控模块
//!
//! 提供指标收集、分布式追踪、监控告警等功能

use serde::{Deserialize, Serialize};
use std::collections::HashMap;

/// 遥测错误类型
#[derive(Debug, thiserror::Error)]
pub enum TelemetryError {
    #[error("指标收集失败: {0}")]
    MetricsCollectionFailed(String),

    #[error("追踪失败: {0}")]
    TracingFailed(String),

    #[error("告警发送失败: {0}")]
    AlertSendFailed(String),

    #[error("监控配置错误: {0}")]
    MonitoringConfigError(String),

    #[error("数据导出失败: {0}")]
    DataExportFailed(String),
}

pub type Result<T> = std::result::Result<T, TelemetryError>;

/// 指标数据点
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct MetricPoint {
    pub name: String,
    pub value: f64,
    pub timestamp: chrono::DateTime<chrono::Utc>,
    pub tags: HashMap<String, String>,
}

/// 遥测服务
pub struct TelemetryService {
    enabled: bool,
    metrics: Vec<MetricPoint>,
}

impl TelemetryService {
    pub fn new() -> Self {
        Self {
            enabled: true,
            metrics: Vec::new(),
        }
    }

    pub async fn record_metric(&mut self, metric: MetricPoint) -> Result<()> {
        if !self.enabled {
            return Ok(());
        }

        self.metrics.push(metric);
        Ok(())
    }

    pub async fn get_metrics(&self) -> Result<Vec<MetricPoint>> {
        Ok(self.metrics.clone())
    }

    pub async fn send_alert(&self, message: &str) -> Result<()> {
        tracing::warn!("Alert: {}", message);
        Ok(())
    }
}

impl Default for TelemetryService {
    fn default() -> Self {
        Self::new()
    }
}
